Fatal error: Class 'XoopsCalendar' not found in /home/r13083/www/class/xoopsform/formcalendar.php on line 50

<?php
/**
* CALENDAR form element
*
* You may not change or alter any portion of this comment or credits
* of supporting developers from this source code or any supporting source code
* which is considered copyrighted (c) material of the original comment or credit authors.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* @copyright The XOOPS Project http://sourceforge.net/projects/xoops/
* @license http://www.fsf.org/copyleft/gpl.html GNU public license
* @package kernel
* @subpackage form
* @since 2.4.0
* @author Laurent JEN <dugris@frxoops.org>
* @version $Id: formcalendar.php 2913 2009-03-08 20:31:09Z dugris $
*/
if (!defined("XOOPS_ROOT_PATH")) {
die("XOOPS root path not defined");
}

xoops_load('XoopsFormElement');

/**
* See File: class/calendar/calendar.php | (c) dynarch.com 2004
* Distributed as part of "The Coolest DHTML Calendar"
* under the same terms.
*
* www.dynarch.com/projects/calendar
*/


class XoopsFormCalendar extends XoopsFormText
{
var $calendarHandler;

/**
* Constuctor
*
* @param string $caption caption
* @param string $name name
* @param string $size field size ( default : 15 )
* @param int $value field value ( default : time() )
*/
function XoopsFormCalendar($caption, $name, $size = 15, $value = 0)
{
xoops_load("calendar");
$this->calendarHandler =& XoopsCalendar::getInstance();
$this->calendarHandler->loadHandler();

$value = !is_numeric($value) ? time() : intval($value);
$size = !is_numeric($size) ? 15 : intval($size);

$this->setCaption($caption);
$this->setName($name);
$this->setValue($value);
$this->setSize($size);
}

function setConfig($name, $val)
{
return $this->calendarHandler->setConfig($name, $val);
}

function setSize($size) {
$this->_size = intval($size);
}

function getSize() {
return $this->_size;
}

function render()
{
return $this->calendarHandler->render($this);
}

}
?>